devel/librashader: Update to 0.4.2
Changes:
https://github.com/SnowflakePowered/librashader/releases/tag/librashader-v0.4.0
https://github.com/SnowflakePowered/librashader/releases/tag/librashader-v0.4.1
https://github.com/SnowflakePowered/librashader/releases/tag/librashader-v0.4.2
PR: 281331
Approved by: submitter is maintainer